package com.anasoft.os.daofusion.bitemporal;
/*
 *  Copyright 2001-2007 Stephen Colebourne
 *
 *  Licensed under the Apache License, Version 2.0 (the "License");
 *  you may not use this file except in compliance with the License.
 *  You may obtain a copy of the License at
 *
 *      http://www.apache.org/licenses/LICENSE-2.0
 *
 *  Unless required by applicable law or agreed to in writing, software
 *  distributed under the License is distributed on an "AS IS" BASIS,
 *  WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
 *  See the License for the specific language governing permissions and
 *  limitations under the License.
 */

import java.io.Serializable;
import java.sql.PreparedStatement;
import java.sql.ResultSet;
import java.sql.SQLException;
import java.sql.Types;

import org.hibernate.Hibernate;
import org.hibernate.HibernateException;
import org.hibernate.usertype.EnhancedUserType;
import org.joda.time.DateTime;

/**
 * Persist {@link org.joda.time.DateTime} via hibernate
 *
 * @author Mario Ivankovits (mario@ops.co.at)
 */
public class PersistentDateTime implements EnhancedUserType
{
    
    public static final String TYPE = "com.anasoft.os.daofusion.bitemporal.PersistentDateTime";
    
    public final static PersistentDateTime INSTANCE = new PersistentDateTime();

    private static final int[] SQL_TYPES = new int[]
    {
        Types.TIMESTAMP,
    };

    public int[] sqlTypes()
    {
        return SQL_TYPES;
    }

    public Class<DateTime> returnedClass()
    {
        return DateTime.class;
    }

    public boolean equals(Object x, Object y) throws HibernateException
    {
        if (x == y)
        {
            return true;
        }
        if (x == null || y == null)
        {
            return false;
        }
        DateTime dtx = (DateTime) x;
        DateTime dty = (DateTime) y;

        return dtx.equals(dty);
    }

    public int hashCode(Object object) throws HibernateException
    {
        return object.hashCode();
    }

    public Object nullSafeGet(ResultSet resultSet, String[] strings, Object object) throws HibernateException, SQLException
    {
        return nullSafeGet(resultSet, strings[0]);

    }

    public Object nullSafeGet(ResultSet resultSet, String string) throws SQLException
    {
        Object timestamp = Hibernate.TIMESTAMP.nullSafeGet(resultSet, string);
        if (timestamp == null)
        {
            return null;
        }

        return new DateTime(timestamp);
    }

    public void nullSafeSet(PreparedStatement preparedStatement, Object value, int index) throws HibernateException, SQLException
    {
        if (value == null)
        {
            Hibernate.TIMESTAMP.nullSafeSet(preparedStatement, null, index);
        }
        else
        {
            Hibernate.TIMESTAMP.nullSafeSet(preparedStatement, ((DateTime) value).toDate(), index);
        }
    }

    public Object deepCopy(Object value) throws HibernateException
    {
        if (value == null)
        {
            return null;
        }

        return new DateTime(value);
    }

    public boolean isMutable()
    {
        return false;
    }

    public Serializable disassemble(Object value) throws HibernateException
    {
        return (Serializable) value;
    }

    public Object assemble(Serializable cached, Object value) throws HibernateException
    {
        return cached;
    }

    public Object replace(Object original, Object target, Object owner) throws HibernateException
    {
        return original;
    }

    public String objectToSQLString(Object object)
    {
        throw new UnsupportedOperationException();
    }

    public String toXMLString(Object object)
    {
        return object.toString();
    }

    public Object fromXMLString(String string)
    {
        return new DateTime(string);
    }
}
